In order to actually run the PDA debugger example, you will need a Perl interpreter. 
  Linux®™ comes with Perl. For Microsoft® Windows®, we use either 
  ActivePerl (http://www.activeperl.com/) or Indigo Perl 
  (http://www.indigostar.com/). You also 
  have to set the string substitution variable named “perlExecutable” 
  to the complete path to your Perl interpreter. (For example, ours was C:\perl\bin\perl.exe) 
  To set a string substitution variable, use the Windows > Preferences > 
  Run/Debug > String Substitution preferences page.